com.amazon.opendistroforelasticsearch.security.tools.Hasher Maven / Gradle / Ivy
/*
* Copyright 2015-2018 _floragunn_ GmbH
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Portions Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazon.opendistroforelasticsearch.security.tools;
import java.io.Console;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.Objects;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.bouncycastle.crypto.generators.OpenBSDBCrypt;
public class Hasher {
public static void main(final String[] args) {
final Options options = new Options();
final HelpFormatter formatter = new HelpFormatter();
options.addOption(Option.builder("p").argName("password").hasArg().desc("Cleartext password to hash").build());
options.addOption(Option.builder("env").argName("name environment variable").hasArg().desc("name environment variable to read password from").build());
final CommandLineParser parser = new DefaultParser();
try {
final CommandLine line = parser.parse(options, args);
if(line.hasOption("p")) {
System.out.println(hash(line.getOptionValue("p").toCharArray()));
} else if(line.hasOption("env")) {
final String pwd = System.getenv(line.getOptionValue("env"));
if(pwd == null || pwd.isEmpty()) {
throw new Exception("No environment variable '"+line.getOptionValue("env")+"' set");
}
System.out.println(hash(pwd.toCharArray()));
} else {
final Console console = System.console();
if(console == null) {
throw new Exception("Cannot allocate a console");
}
final char[] passwd = console.readPassword("[%s]", "Password:");
System.out.println(hash(passwd));
}
} catch (final Exception exp) {
System.err.println("Parsing failed. Reason: " + exp.getMessage());
formatter.printHelp("hasher.sh", options, true);
System.exit(-1);
}
}
public static String hash(final char[] clearTextPassword) {
final byte[] salt = new byte[16];
new SecureRandom().nextBytes(salt);
final String hash = OpenBSDBCrypt.generate((Objects.requireNonNull(clearTextPassword)), salt, 12);
Arrays.fill(salt, (byte)0);
Arrays.fill(clearTextPassword, '\0');
return hash;
}
}